<template>
    <div class="login_container">
       <div class="login_box">
           <!--图像区域-->
           <div class="avatar_box">
               <img src="../assets/logo.png" alt="">
           </div>
           <!--登录表单区域 -->
           <el-form label-width="0px" ref="loginFormRef" :model="loginForm" :rules="loginFormRules" class="login_form">
            <!--用户名-->
            <el-form-item prop="username" >
                <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
            </el-form-item>
            <!--密码-->
            <el-form-item prop="password" >
                <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
            </el-form-item>
             <el-form-item class="btns">
                 <el-button type="primary" @click="login">登录</el-button>
                 <el-button type="info" @click="resetLoginForm">重置</el-button>
            </el-form-item>
           </el-form>
       </div>
    </div>
</template>

<script>
export default {
    data() {
    return {
        loginForm: {
            username: 'lisi',
            password: '123'
            },
        loginFormRules: {
          username: [
            { required: true, message: '请输入登录用户名称', trigger: 'blur' },
            { min: 3, max: 20, message: '长度在 3 到 20 个字符', trigger: 'blur' }
          ],
           password: [
            { required: true, message: '请输入登录密码', trigger: 'blur' },
            { min: 3, max: 20, message: '长度在 3 到 20 个字符', trigger: 'blur' }
          ],
        }
        }
    },
    methods: {
        resetLoginForm() {
            console.log(this);
            this.$refs.loginFormRef.resetFields();
        },
        login() {
            this.$refs.loginFormRef.validate( async valid => {
                console.log(valid);
                if(!valid) return
                const { data: res } = await this.$http.post("login", this.loginForm);
                console.log(res);
                if( res.meta.status !== 200)
                {
                 //  return console.log("登录失败");
                   this.$message.error('错了哦，这是一条错误消息');
                   return
                }
                //console.log("登录成功");
                 this.$message({
                 message: '恭喜你，这是一条成功消息',
                 type: 'success'
                });

                //1.登录成功之后的 token, 保存到客户端的sessionStorage中存储
                window.sessionStorage.setItem('token', res.data.token);

                //2.通过编程式导航跳转到后台的主页
                this.$router.push('/home');

            });
        }
    }
}
</script>

<style lang="less" scoped>
.login_container {
    background-color: cadetblue;
    height: 100%;
}
.login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    .avatar_box {
        width: 130px;
        height: 130px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px;
        position: absolute;
        left: 50%;
        transform: translate(-50%, -50%);
        background-color: #fff;
        img {
            width: 100%;
            height: 100%;
            border-radius: 50%;
            background-color: #eee;
        }
    }
}

.login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}

.btns {
    display: flex;
    justify-content: flex-end;
}
</style>
